A field chopper, having a chopper drum or reel rotatable on the chassis and a plurality of feed rollers for advancing the crop material to the chopper drum, is provided with a pair of arms flanking the drum and swingable about the axis thereof. The arms each carry a pivotal compensating bar, a pair of pressing rollers being journaled on these arms and being driven by gears meshing with a central pinion whose shaft forms the axis of one of the bars and is, in turn, driven by a transmission. The pressing roller proximal to the blade drum is received in notches in the compensating bars and is connected thereto so as to be easily releasable.
The invention relates to a field chopper having at least one rotatable lower rough-press roll and at least one rotatable upper rough-press roll. Between the rough-press rolls crop is pressed and fed to a chopping drum where blades chop the crop. A space is defined down stream of the moveable rough-pressing roll between the chopping drum, the stream of pressed crop and the movable rough-press roll. Located in this space is a pressing element that acts on the pressed crop and which exerts a rough-pressing effect on the pressed crop downstream of the movable rough-press roll and upstream of the chopping drum.
